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CS8900A-IQ3 参数 Datasheet PDF下载

CS8900A-IQ3图片预览
型号: CS8900A-IQ3
PDF下载: 下载PDF文件 查看货源
内容描述: 水晶局域网? ISA以太网控制器 [Crystal LAN ⑩ ISA Ethernet Controller]
分类和应用: 控制器局域网以太网
文件页数/大小: 128 页 / 1360 K
品牌: CIRRUS [ CIRRUS LOGIC ]
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CS8900A  
Crystal LAN™ ISA Ethernet Controller  
4.4.14 Register 10: Receiver Miss Counter  
(RxMISS, Read-only, Address: PacketPage base + 0130h)  
7
6
5
4
3
2
1
9
0
8
MissCount  
010000  
F
E
D
C
B
A
MissCount  
The RxMISS counter (Bits 6 through F) records the number of receive frames that are lost (missed) due to the lack  
of available buffer space. If the MissOvfloiE bit (Register B, BufCFG, Bit D) is set, there is an interrupt when RxMISS  
increments from 1FFh to 200h. This interrupt provides the host with an early warning that the RxMISS counter should  
be read before it reaches 3FFh and starts over (by interrupting at 200h, the host has an additional 512 counts before  
RxMISS actually overflows). The RxMISS counter is cleared when read.  
010000  
These bits provide an internal address used by the CS8900A to identify this as the Receiver  
Miss Counter. When reading this register, these bits will be 010000, where the LSB corre-  
sponds to Bit 0.  
MissCount  
The upper ten bits contain the number of missed frames.  
Register’s value is: 0000 0000 0001 0000  
CIRRUS LOGIC PRODUCT DATA SHEET  
DS271PP3  
61  
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